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Question
The inhibitory effect of vagus nerve on the heart is due to the secretion of
The inhibitory effect of vagus nerve on the heart is due to the secretion of
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Solution
The correct option is A Acetylcholine
The autonomous nervous system controls the heartbeat rate via the cardioregulatory centre in the medulla oblongata. The emergency conditions activate the sympathetic motor nerve and make the adrenal medulla to release epinephrine and norepinephrine which in turn increase the heartbeat rate. On the other hand, vagus nerve conducts the parasympathetic motor impulses which in turn slow down the heartbeat rate by the effect of acetylcholine; a neurotransmitter released by the parasympathetic nervous system. Glycine and dopamine are neurotransmitters of the central nervous system while the heartbeat rate is controlled by an autonomous nervous system; a division of peripheral nervous system. Thus, the correct answer is option A.
The autonomous nervous system controls the heartbeat rate via the cardioregulatory centre in the medulla oblongata. The emergency conditions activate the sympathetic motor nerve and make the adrenal medulla to release epinephrine and norepinephrine which in turn increase the heartbeat rate. On the other hand, vagus nerve conducts the parasympathetic motor impulses which in turn slow down the heartbeat rate by the effect of acetylcholine; a neurotransmitter released by the parasympathetic nervous system. Glycine and dopamine are neurotransmitters of the central nervous system while the heartbeat rate is controlled by an autonomous nervous system; a division of peripheral nervous system. Thus, the correct answer is option A.
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